Presenting an image indicating a position for a person

ABSTRACT

Methods for presenting an image indicating a position for a person are disclosed. A method includes: determining, by a computing device, at least one free space in a location using at least one camera; determining, using the computing device, a new position for a first person in the location based upon the determined at least one free space in the location; and presenting an image to indicate the determined new position for the first person in the location.

BACKGROUND

The present invention generally relates to computing systems and, moreparticularly, to a system and method for presenting an image indicatinga position for a person.

In a crowded area such as an elevator car, a train car, a room, or anyother location, people may position themselves near an entrance to thecrowded area, even though free space may be present in a rear portion orother portion of the crowded area. When multiple people positionthemselves near the entrance to the crowded area, entry of additionalpersons into the crowded area may be more difficult or more timeconsuming. Additionally, it may not be possible for the maximum numberof persons to enter the crowded area as access to the free space may beblocked by the people positioned near the entrance.

When an area such as an elevator car, train car, room, or other locationis not crowded, people may position themselves in a cluster rather thanspreading out throughout the area. This may reduce the comfort of thepeople in the cluster and entry of additional persons into the area maybe more difficult or more time consuming.

SUMMARY

In a first aspect of the invention, there is a method that includes:determining, by a computing device, at least one free space in alocation using at least one camera; determining, using the computingdevice, a new position for a first person in the location based upon thedetermined at least one free space in the location; and presenting animage to indicate the determined new position for the first person inthe location.

In another aspect of the invention, there is a computer program productthat includes a computer readable storage medium having programinstructions embodied therewith. The program instructions are executableby a computing device to cause the computing device to: determine anumber of persons waiting to enter a location; determine at least onefree space in the location using at least one camera; determine aposition in the location for at least one of the persons waiting toenter the location based on the determined at least one free space inthe location; and present an image to indicate the determined positionin the location for at least one of the persons waiting to enter thelocation.

In another aspect of the invention, there is a system that includes: ahardware processor, a computer readable memory, and a computer readablestorage medium associated with a computer device; at least one camera;program instructions of a free space determiner configured to determineat least one free space in a location using the at least one camera;program instructions of a new position determiner configured todetermine, for a first person in the location, a new position based uponthe at least one free space in the location determined by the free spacedeterminer; and program instructions of an image presenter configured topresent an image in the location to indicate the new position for thefirst person in the location determined by the new position determiner.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is described in the detailed description whichfollows, in reference to the noted plurality of drawings by way ofnon-limiting examples of exemplary embodiments of the present invention.

FIG. 1 depicts a computer system in accordance with aspects of theinvention.

FIG. 2 depicts a block diagram of a system in accordance with aspects ofthe invention.

FIGS. 3A and 3B depict illustrative environments in accordance withaspects of the invention.

FIG. 4 depicts a configuration of a display device on or under a floorin accordance with aspects of the invention.

FIG. 5 depicts another configuration of a display device on or under afloor in accordance with aspects of the invention.

FIG. 6 depicts an exemplary method for presenting an image to direct aperson to a new position in an area that may facilitate the entry of oneor more additional persons into the area, in accordance with aspects ofthe invention.

FIG. 7 depicts an exemplary method for presenting an image to direct aperson to a new position in an area that may increase the comfort of oneor more persons by increasing an amount of personal space, in accordancewith aspects of the invention.

FIG. 8 depicts an exemplary method for presenting an image to direct aperson in a waiting area to a free space in an area, in accordance withaspects of the invention.

FIG. 9A shows a graphical depiction of an example of areas of anelevator car occupied by three persons.

FIG. 9B depicts information about the example elevator car of FIG. 9Athat the system may determine using a scanner in accordance with aspectsof the invention.

FIG. 9C depicts information about the example elevator car of FIG. 9Athat the system may determine using one or more cameras and the scannerin accordance with aspects of the invention.

FIGS. 10A, 10B, 10C, 10D, and 10E illustrate an example of the system inoperation in accordance with aspects of the invention.

FIG. 11 depicts an exemplary method that may facilitate the entry of oneor more additional persons into a crowded area, in accordance withaspects of the invention.

FIG. 12 depicts an exemplary method that may increase the comfort of oneor more persons in an uncrowded area by increasing an amount of personalspace, in accordance with aspects of the invention.

FIGS. 13A, 13B, 13C, and 13D illustrate an example of the system inoperation in accordance with aspects of the invention.

DETAILED DESCRIPTION

The present invention generally relates to computing systems and, moreparticularly, to a system and method for presenting an image indicatinga position for a person. Aspects of the invention are directed todisplaying a position (e.g., a standing area) for a person in an areasuch as an elevator car, a train car, a room, or any other locationusing an image (e.g., a footprint projection). Other aspects of theinvention are directed to computing a density and/or number of personsin an area using sensors and/or cameras, evaluating existing positions(e.g., standing positions) of the persons in the area based on thedensity and/or number of persons, and displaying one or more footprintsor other images on the floor to be followed by one or more of thepersons to new positions in the area. The new positions may bedetermined taking into account an amount of space occupied by each ofthe persons (e.g., taking into account a size of each of the persons orthe clothes of each of the persons). Additional aspects of the inventionare directed to first displaying a footprint or other image near a footof a particular person to indicate that that person is to follow thefootprint or other image, and then moving the footprint or other imageto a new standing position to direct the particular person to the newstanding position.

As described herein, aspects of the invention may direct persons in anarea to new positions that may facilitate the entry of one or moreadditional persons into the area. Additionally, aspects of the inventionmay direct persons waiting to enter the area to positions inside thearea. Accordingly, these aspects of the invention may speed the entry ofpersons into the area and/or allow a larger number of persons to enterthe area.

Other aspects of the invention may direct persons in an area to newpositions in free space in the area so that persons are not clusteredtogether or standing unnecessarily close to one another. Accordingly,these aspects of the invention may increase the comfort of one or morepersons in the area by increasing an amount of personal space (i.e.,open space) surrounding one or more persons in the area.

The present invention may be a system, a method, and/or a computerprogram product at any possible technical detail level of integration.The computer program product may include a computer readable storagemedium (or media) having computer readable program instructions thereonfor causing a processor to carry out aspects of the present invention.

The computer readable storage medium can be a tangible device that canretain and store instructions for use by an instruction executiondevice. The computer readable storage medium may be, for example, but isnot limited to, an electronic storage device, a magnetic storage device,an optical storage device, an electromagnetic storage device, asemiconductor storage device, or any suitable combination of theforegoing. A non-exhaustive list of more specific examples of thecomputer readable storage medium includes the following: a portablecomputer diskette, a hard disk, a random access memory (RAM), aread-only memory (ROM), an erasable programmable read-only memory (EPROMor Flash memory), a static random access memory (SRAM), a portablecompact disc read-only memory (CD-ROM), a digital versatile disk (DVD),a memory stick, a floppy disk, a mechanically encoded device such aspunch-cards or raised structures in a groove having instructionsrecorded thereon, and any suitable combination of the foregoing. Acomputer readable storage medium, as used herein, is not to be construedas being transitory signals per se, such as radio waves or other freelypropagating electromagnetic waves, electromagnetic waves propagatingthrough a waveguide or other transmission media (e.g., light pulsespassing through a fiber-optic cable), or electrical signals transmittedthrough a wire.

Computer readable program instructions described herein can bedownloaded to respective computing/processing devices from a computerreadable storage medium or to an external computer or external storagedevice via a network, for example, the Internet, a local area network, awide area network and/or a wireless network. The network may comprisecopper transmission cables, optical transmission fibers, wirelesstransmission, routers, firewalls, switches, gateway computers and/oredge servers. A network adapter card or network interface in eachcomputing/processing device receives computer readable programinstructions from the network and forwards the computer readable programinstructions for storage in a computer readable storage medium withinthe respective computing/processing device.

Computer readable program instructions for carrying out operations ofthe present invention may be assembler instructions,instruction-set-architecture (ISA) instructions, machine instructions,machine dependent instructions, microcode, firmware instructions,state-setting data, configuration data for integrated circuitry, oreither source code or object code written in any combination of one ormore programming languages, including an object oriented programminglanguage such as Smalltalk, C++, or the like, and procedural programminglanguages, such as the “C” programming language or similar programminglanguages. The computer readable program instructions may executeentirely on the user's computer, partly on the user's computer, as astand-alone software package, partly on the user's computer and partlyon a remote computer or entirely on the remote computer or server. Inthe latter scenario, the remote computer may be connected to the user'scomputer through any type of network, including a local area network(LAN) or a wide area network (WAN), or the connection may be made to anexternal computer (for example, through the Internet using an InternetService Provider). In some embodiments, electronic circuitry including,for example, programmable logic circuitry, field-programmable gatearrays (FPGA), or programmable logic arrays (PLA) may execute thecomputer readable program instructions by utilizing state information ofthe computer readable program instructions to personalize the electroniccircuitry, in order to perform aspects of the present invention.

Aspects of the present invention are described herein with reference toflowchart illustrations and/or block diagrams of methods, apparatus(systems), and computer program products according to embodiments of theinvention. It will be understood that each block of the flowchartillustrations and/or block diagrams, and combinations of blocks in theflowchart illustrations and/or block diagrams, can be implemented bycomputer readable program instructions.

These computer readable program instructions may be provided to aprocessor of a general purpose computer, special purpose computer, orother programmable data processing apparatus to produce a machine, suchthat the instructions, which execute via the processor of the computeror other programmable data processing apparatus, create means forimplementing the functions/acts specified in the flowchart and/or blockdiagram block or blocks. These computer readable program instructionsmay also be stored in a computer readable storage medium that can directa computer, a programmable data processing apparatus, and/or otherdevices to function in a particular manner, such that the computerreadable storage medium having instructions stored therein comprises anarticle of manufacture including instructions which implement aspects ofthe function/act specified in the flowchart and/or block diagram blockor blocks.

The computer readable program instructions may also be loaded onto acomputer, other programmable data processing apparatus, or other deviceto cause a series of operational steps to be performed on the computer,other programmable apparatus or other device to produce a computerimplemented process, such that the instructions which execute on thecomputer, other programmable apparatus, or other device implement thefunctions/acts specified in the flowchart and/or block diagram block orblocks.

The flowchart and block diagrams in the Figures illustrate thearchitecture, functionality, and operation of possible implementationsof systems, methods, and computer program products according to variousembodiments of the present invention. In this regard, each block in theflowchart or block diagrams may represent a module, segment, or portionof instructions, which comprises one or more executable instructions forimplementing the specified logical function(s). In some alternativeimplementations, the functions noted in the blocks may occur out of theorder noted in the Figures. For example, two blocks shown in successionmay, in fact, be executed substantially concurrently, or the blocks maysometimes be executed in the reverse order, depending upon thefunctionality involved. It will also be noted that each block of theblock diagrams and/or flowchart illustration, and combinations of blocksin the block diagrams and/or flowchart illustration, can be implementedby special purpose hardware-based systems that perform the specifiedfunctions or acts or carry out combinations of special purpose hardwareand computer instructions.

Referring now to FIG. 1, a schematic of an example of a computinginfrastructure is shown. Computing infrastructure 10 is only one exampleof a suitable computing infrastructure and is not intended to suggestany limitation as to the scope of use or functionality of embodiments ofthe invention described herein. Regardless, computing infrastructure 10is capable of being implemented and/or performing any of thefunctionality set forth hereinabove.

In computing infrastructure 10 there is a computer system (or server)12, which is operational with numerous other general purpose or specialpurpose computing system environments or configurations. Examples ofwell-known computing systems, environments, and/or configurations thatmay be suitable for use with computer system 12 include, but are notlimited to, personal computer systems, server computer systems, thinclients, thick clients, hand-held or laptop devices, multiprocessorsystems, microprocessor-based systems, set top boxes, programmableconsumer electronics, network PCs, minicomputer systems, mainframecomputer systems, and distributed cloud computing environments thatinclude any of the above systems or devices, and the like.

Computer system 12 may be described in the general context of computersystem executable instructions, such as program modules, being executedby a computer system. Generally, program modules may include routines,programs, objects, components, logic, data structures, and so on thatperform particular tasks or implement particular abstract data types.Computer system 12 may be practiced in distributed cloud computingenvironments where tasks are performed by remote processing devices thatare linked through a communications network. In a distributed cloudcomputing environment, program modules may be located in both local andremote computer system storage media including memory storage devices.

As shown in FIG. 1, computer system 12 in computing infrastructure 10 isshown in the form of a general-purpose computing device. The componentsof computer system 12 may include, but are not limited to, one or moreprocessors or processing units (e.g., CPU) 16, a system memory 28, and abus 18 that couples various system components including system memory 28to processor 16.

Bus 18 represents one or more of any of several types of bus structures,including a memory bus or memory controller, a peripheral bus, anaccelerated graphics port, and a processor or local bus using any of avariety of bus architectures. By way of example, and not limitation,such architectures include Industry Standard Architecture (ISA) bus,Micro Channel Architecture (MCA) bus, Enhanced ISA (EISA) bus, VideoElectronics Standards Association (VESA) local bus, and PeripheralComponent Interconnects (PCI) bus.

Computer system 12 typically includes a variety of computer systemreadable media. Such media may be any available media that is accessibleby computer system 12, and it includes both volatile and non-volatilemedia, removable and non-removable media.

System memory 28 can include computer system readable media in the formof volatile memory, such as random access memory (RAM) 30 and/or cachememory 32. Computer system 12 may further include otherremovable/non-removable, volatile/non-volatile computer system storagemedia. By way of example only, storage system 34 can be provided forreading from and writing to a nonremovable, non-volatile magnetic media(not shown and typically called a “hard drive”). Although not shown, amagnetic disk drive for reading from and writing to a removable,non-volatile magnetic disk (e.g., a “floppy disk”), and an optical diskdrive for reading from or writing to a removable, non-volatile opticaldisk such as a CD-ROM, DVD-ROM or other optical media can be provided.In such instances, each can be connected to bus 18 by one or more datamedia interfaces. As will be further depicted and described below,memory 28 may include at least one program product having a set (e.g.,at least one) of program modules that are configured to carry out thefunctions of embodiments of the invention.

Program/utility 40, having a set (at least one) of program modules 42,may be stored in memory 28 by way of example, and not limitation, aswell as an operating system, one or more application programs, otherprogram modules, and program data. Each of the operating system, one ormore application programs, other program modules, and program data orsome combination thereof, may include an implementation of a networkingenvironment. Program modules 42 generally carry out the functions and/ormethodologies of embodiments of the invention as described herein.

Computer system 12 may also communicate with one or more externaldevices 14 such as a keyboard, a pointing device, a display 24, etc.;one or more devices that enable a user to interact with computer system12; and/or any devices (e.g., network card, modem, etc.) that enablecomputer system 12 to communicate with one or more other computingdevices. Such communication can occur via Input/Output (I/O) interfaces22. Still yet, computer system 12 can communicate with one or morenetworks such as a local area network (LAN), a general wide area network(WAN), and/or a public network (e.g., the Internet) via network adapter20. As depicted, network adapter 20 communicates with the othercomponents of computer system 12 via bus 18. It should be understoodthat although not shown, other hardware and/or software components couldbe used in conjunction with computer system 12. Examples, include, butare not limited to: microcode, device drivers, redundant processingunits, external disk drive arrays, RAID systems, tape drives, and dataarchival storage systems, etc.

FIG. 2 depicts a block diagram of a system 200 in accordance withaspects of the invention. As shown, system 200 comprises a server 250,which according to an embodiment may be a computer server 12 as shown inFIG. 1. The server 250 is in communication with one or more cameras 210,one or more sensors 220, or a combination of one or more cameras 210 andone or more sensors 220.

In embodiments, the cameras 210 and sensors 220 are configured to obtainimages of an area and information about a number of persons, locationsof persons, sizes of persons, and free spaces in the area, as describedherein. This data is transmitted to and used by the server 250 todetermine new positions for persons in the area. The cameras 210 andsensors 220 may be directly connected to the server 250 via a UniversalSerial Bus (USB) or other direct connection, connected via a LAN, orconnected via the Internet or another network. The connection betweenthe cameras 210 and sensors 220 and the server 250 may be a wiredconnection or a wireless connection. According to another embodiment,the system 200 may omit the cameras 210 or the sensors 220.

In embodiments, the cameras 210 may be digital still cameras, digitalvideo cameras, thermographic cameras, or any other type of camera. Anumber of cameras 210 may be proportional to a ceiling area of the area.According to an embodiment, one camera 210 may be provided per onesquare meter of ceiling area. For example, if the ceiling area is foursquare meters, four cameras 210 are required and each camera 210 isplaced in the center of each one square meter area.

In embodiments, the sensors 220 may be placed above and over a center ofan entrance to the area. The sensors 220 may be any type of devicecapable of determining a planar surface area of persons entering thearea through the entrance.

Operations of various embodiments are described below as using one ormore cameras 210 and/or one or more sensors 220. However, otherembodiments may only use one or more cameras 210 or may only use one ormore sensors 220. Operations described herein as being performed by oneor more cameras 210 may instead be performed by one or more sensors 220.Additionally, operations described herein as being performed by one ormore sensors 220 may instead be performed by one or more cameras 210.

The server 250 is also in communication with one or more display devices230. In embodiments, the display devices 230 are configured to projector display one or more images to indicate positions for persons in anarea, as described herein. The display devices 230 may be directlyconnected to the server 250 via a USB or other direct connection,connected via a LAN, or connected via the Internet or another network.In embodiments, the server 250 is configured to transmit images to thedisplay devices 230 to display in the area to indicate positions forpersons, as described herein. In embodiments, the display device 230 maybe any type of device capable of projecting an image onto a surface ordisplaying an image on a surface, including but not limited to a digitalprojector, a liquid crystal display (LCD) screen, or an organic lightemitting diode (OLED) screen. The display device 230 may be positionedsuch that the one or more images projected or displayed by the displaydevice 230 covers all or substantially all of a floor of the area.

Additionally, the server 250 may be in communication with one or moreexterior cameras 240. The exterior cameras 240 may be configured toobtain images of persons waiting to enter the area (e.g., personswaiting near an entrance to the area or in a queuing area or otherwaiting area) and information about a number of the persons, locationsof the persons, and sizes of the persons. The exterior cameras 240 maybe directly connected to the server 250 via a USB or other directconnection, connected via a LAN, or connected via the Internet oranother network.

In embodiments, the exterior cameras 240 may be digital still cameras,digital video cameras, thermographic cameras, or any other type ofcamera. A number of exterior cameras 240 may be proportional to aceiling area of the queuing area or other waiting area. According to anembodiment, one exterior camera 240 may be provided per one square meterof ceiling area. For example, if the ceiling area is four square meters,four exterior cameras 240 are required and each exterior camera 240 isplaced in the center of each one square meter area.

According to another embodiment, the system 200 may omit the exteriorcameras 240. According to still another embodiment, exterior sensors maybe used instead of or in addition to the exterior cameras 240. Theexterior sensors may function in the same manner as the interior sensors220, as described above.

FIGS. 3A and 3B depict illustrative environments in accordance withaspects of the invention. The cameras 210 and the sensors 220 of thesystem 200 illustrated in FIG. 2 may be located inside an area such asan elevator car, a train car, a room, or any other location where thesystem is to display the standing areas, such as inside the elevator car310 as illustrated in FIG. 3A. Alternatively, the cameras 210 and thesensors 220 may be positioned in a location outside of but havingvisibility into the area, or in a combination of the aforementionedlocations. For example, the cameras 210 and the sensors 220 may bepositioned outside of the elevator car 310 in a location havingvisibility into the elevator car 310.

The number of cameras 210 may be determined based on a size of the areaand such that a number of persons therein as well as the locations andsizes of free spaces (i.e., spaces that are not occupied by any person)therein may be determined or approximated using the cameras 210. Thecameras 210 may be positioned on a ceiling in the area such that thecameras capture images of the area and persons therein. Alternatively,the cameras 210 may be positioned on walls or in other locations in thearea such that the cameras capture images of the area and personstherein.

The sensors 220 may be positioned on a ceiling of the area such that asize of each person therein may be determined. According to anembodiment, the sensors 220 may be positioned in or near an entrance tothe area so that a minimum occupancy area (e.g., a size) of each personentering may be determined. For example, the sensors 220 may include anyof the above-mentioned sensor types and may be positioned in the ceilingand near the entrance to the elevator car 310, as illustrated in FIG.3A. Alternatively, the sensors 220 may be positioned on walls or inother locations in the area such that the sensors 220 obtain informationregarding a size of each person in or entering the area.

The one or more display devices 230 may be configured to display animage on a floor of the area where the system is to display the standingareas. For example, the one or more display devices 230 may beconfigured to project or display an image on a floor of the elevator car310 as illustrated in FIG. 3A.

Optionally, the server 250 may be in communication with one or moreexterior cameras 240 which are positioned outside of the area where thesystem is to display the standing areas. For example, the one or moreexterior cameras 240 may be positioned in the elevator lobby 300 asillustrated in FIG. 3B, which may be outside of the elevator car 310illustrated in FIG. 3A. The exterior cameras 240 may be configured toobtain images of persons waiting to enter the elevator car 310 (e.g.,persons waiting near an entrance to the area or in a queuing area orother waiting area) and information about a number of the persons,locations of the persons, and sizes of the persons positioned near anentrance to the area where the system is to display the standing areasor in a queuing area or other waiting area for the area where the systemis to display the standing areas. The number of exterior cameras 240installed near the entrance to or in the queueing area for the areawhere the system is to display the standing areas may be determinedbased on a size of the area near the entrance or the queuing area andsuch that a number of persons in the area near the entrance or thequeuing area may be determined or approximated. The particular locationsof the exterior cameras 240 installed near the entrance to or in thequeueing area for the elevator car, train car, room, or other locationmay be determined based on the number of the exterior cameras 240 andthe capabilities and performance characteristics thereof. The exteriorcameras 240 may be connected to the computer server 12 via any type ofwired or wireless connection, either directly or via a network such asthe Internet or a LAN.

FIG. 4 depicts a configuration of a display device 230 on or under afloor in accordance with aspects of the invention. According to anembodiment, the display device 230 of the system 200 of FIG. 2 may be adisplay device 400, as illustrated in FIG. 4, that is installed on orunder the floor of the area, and reinforced glass 410 or anotherprotective surface may be installed above the display device 400 suchthat persons in the area stand on the reinforced glass 410 or otherprotective surface rather than directly on the display device 400.

FIG. 5 depicts another configuration of a display device 230 on or undera floor in accordance with aspects of the invention. According toanother embodiment, the display device 230 of the system 200 of FIG. 2may be a digital projector 500, as illustrated in FIG. 5, that isinstalled under the floor of the area and configured such that thedigital projector 500 projects an image onto a transmissive projectionscreen 510 located between the digital projector 500 and the floor ofthe area. Reinforced glass 520 or another protective surface may beinstalled above the projection screen 510 such that persons in the areastand on the reinforced glass 520 or other protective surface ratherthan directly on the projection screen 510.

The one or more display devices 230 may also include an additionaldisplay device configured to display or project images or other visualsignals in other locations in the area. This additional display devicemay provide an additional indication to alert persons in the arearegarding the new standing positions. Alternatively, instead of or inaddition to the additional display device, the system 200 may include aspeaker that may provide a voice announcement, tone, or other sound asan additional indication to alert persons in the area regarding the newstanding positions. For example, the speaker may announce, “please checkthe floor at your feet.”

FIG. 6 depicts an exemplary method for presenting an image to direct aperson to a new position in an area that may facilitate the entry of oneor more additional persons into the area, in accordance with aspects ofthe invention. The steps of the method may be performed in the computersystem of FIG. 1, the system of FIG. 2, and the environment illustratedin FIGS. 3A and 3B and are described with reference to the elements andsteps described with respect to FIGS. 1, 2, 3A, and 3B.

At step 600, the system 200 captures an image using a camera. Inembodiments, the system 200 captures one or more images of an area suchas an elevator car, train car, room, or other location using the one ormore cameras 210. The one or more cameras 210 in the ceiling of theelevator car 310 illustrated in FIG. 3A may obtain images of theelevator car 310 including any persons therein. These images aretransmitted from the one or more cameras 210 to the server 250 via anytype of wired or wireless connection, either directly or via a networksuch as the Internet or a LAN.

At step 610, the system 200 determines a free space. In embodiments, thesystem 200, using the server 250, analyzes the images captured at step600 to identify areas in the images having the color of the floor, anddeems these areas to be free spaces in the area. For example, the server250 may be programmed with image processing algorithms that areconfigured to determine free spaces in the area based upon apreregistered color code of the floor. For example, if the color code ofthe floor, #808080, is preregistered, and the image processing algorithmdetects a color other than the preregistered color code (#808080) in theimages captured at step 600, the image processing algorithms maydetermine that the area in the images captured at step 600 that is notthe color #808080 is not a free space. Additionally, the imageprocessing algorithm may determine that the area in the images capturedat step 600 that is the color #808080 is a free space.

At step 620, the system 200 determines a new standing position. Inembodiments, the system 200, using the server 250, determines a newstanding position inside the free space determined at step 610, asdescribed herein with respect to FIGS. 9A-12.

At step 630, the system 200 determines a person adjacent to the freespace determined at step 610. In embodiments, the system 200, using theserver 250, uses image processing to determine a person in front of thefree space (“front” referring to a side nearest an entrance to the area,and “back” referring to a side farthest from the entrance to the area).If multiple free spaces exist, the system 200 may determine the personin front of the free space located farthest from the entrance to thearea.

At step 640, the system 200 displays footprints at a location of aperson adjacent to the free space. In embodiments, the system 200, usingthe server 250, causes the display device 230 to display footprints at alocation of the person determined at step 630 who is adjacent to thefree space determined at step 610. For example, the display device 230may display footprints on or adjacent to the feet of the determinedperson adjacent to the free space.

At step 650, the system 200 moves the displayed footprints to a newstanding position. In embodiments, the system 200, using the server 250,causes the display device 230 to display footprints at the new standingposition determined at step 620 for the person determined at step 630.The footprints may be displayed moving between a current location of theperson determined at step 630 and the new standing position determinedat step 620 for the person determined at step 630. In this manner, theperson determined at step 630 may be directed to a new position in thearea that may facilitate the entry of one or more additional personsinto the area.

FIG. 7 depicts an exemplary method for presenting an image to direct aperson to a new position in an area that may increase the comfort of oneor more persons by increasing an amount of personal space, in accordancewith aspects of the invention. The steps of the method may be performedin the computer system of FIG. 1, the system of FIG. 2, and theenvironment illustrated in FIGS. 3A and 3B and are described withreference to the elements and steps described with respect to FIGS. 1,2, 3A, and 3B.

At step 700, the system 200 captures an image using a camera. Inembodiments, the system 200 captures one or more images of an area suchas an elevator car, train car, room, or other location using the one ormore cameras 210. The one or more cameras 210 in the ceiling of anelevator car 310 illustrated in FIG. 3A may obtain images of theelevator car 310 including any persons therein. These images aretransmitted from the one or more cameras 210 to the server 250 via anytype of wired or wireless connection, either directly or via a networksuch as the Internet or a LAN. The system 200 may also capture data fromthe sensors 220, as described above, and transmit the data to the server250 via any type of wired or wireless connection, either directly or viaa network such as the Internet or a LAN.

At step 710, the system 200 determines a free space. In embodiments, thesystem 200, using the server 250, analyzes the images captured at step700 to identify areas in the images having the color of the floor, anddeems these areas to be free spaces in the area. For example, the server250 may be programmed with image processing algorithms that areconfigured to determine free spaces in the area as described above withrespect to FIG. 6.

At step 720, the system 200, for each person, determines a minimumoccupancy area, a maximum occupancy area, and a maximum occupancyregion. In embodiments, for each person in the area, the system 200,using the server 250, determines a minimum occupancy area of the person,as described herein, based on the one or more images of the areacaptured using the one or more cameras 210 and/or data regarding sizesof persons received from the one or more sensors 220 at step 700.Additionally, the system 200, using the server 250, determines a maximumoccupancy area for each person, as described herein, based on the freespaces determined at step 710 and the determined minimum occupancy areaof the person. Furthermore, the system 200, using the server 250,determines a maximum occupancy region of the person corresponding to themaximum occupancy area, as described herein.

At step 730, the system 200 determines a pair of persons with a greatestoverlap of maximum occupancy regions. In embodiments, the system 200,using the server 250, determines the pair of persons with the greatestoverlap of maximum occupancy regions based on the maximum occupancyareas and maximum occupancy regions determined at step 720.

At step 740, the system 200 determines a person from the pair that isclosest to the free space. In embodiments, the system 200, using theserver 250, determines the person from the pair of persons determined atstep 730 who is closest to a free space determined at step 710. Ifmultiple free spaces were determined at step 710, the system 200 may usethe free space that is located farthest from the entrance to the area.

At step 750, the system 200 determines a new standing position. Inembodiments, the system 200, using the server 250, determines the newstanding position in the free space determined at step 710 for theperson from the pair of persons determined at step 740 who is closest tothe free space. The new standing position is determined such that anoverlapping area of the person with other persons is smallest.

At step 760, the system 200 displays footprints at a person's location.In embodiments, the system 200, using the server 250, causes the displaydevice 230 to display footprints at a location of the person determinedat step 740. For example, the display device 230 may display footprintson or adjacent to the feet of the determined person.

At step 770, the system 200 moves the displayed footprints to the newstanding position. In embodiments, the system 200, using the server 250,causes the display device 230 to display footprints at the new standingposition in the free space as determined at step 750 for the persondetermined at step 740. The footprints may be displayed moving betweenthe location of the determined person adjacent to the free space and thenew standing position in the free space for the determined person. Inthis manner, the person determined at step 740 may be directed to a newposition in the area that may increase the comfort of one or morepersons by increasing an amount of personal space.

FIG. 8 depicts an exemplary method for presenting an image to direct aperson in a waiting area to a free space in an area, in accordance withaspects of the invention. The steps of the method may be performed inthe computer system of FIG. 1, the system of FIG. 2, and the environmentillustrated in FIGS. 3A and 3B and are described with reference to theelements and steps described with respect to FIGS. 1, 2, 3A, and 3B.

At step 800, the system 200 captures images using a camera. Inembodiments, the system 200 captures one or more images of a queuingarea or other waiting area for an elevator car, train car, room, orother location where the system 200 is to display the standing areas,using one or more exterior cameras 240. For example, one or moreexterior cameras 240 in the ceiling of an elevator lobby 300 illustratedin FIG. 3B may obtain images of the elevator lobby 300 including anypersons therein. These images may be transmitted from the one or moreexterior cameras 240 to the server 250 via any type of wired or wirelessconnection, either directly or via a network such as the Internet or aLAN.

At step 810, the system 200 determines a size of each waiting person. Inembodiments, the system 200, using the server 250, analyzes the imagescaptured at step 800 to determine an approximate number of persons inthe queuing area or other waiting area and an approximate size of eachof the persons in the queuing area or other waiting area. For example,the server 250 may be programmed with image processing algorithms thatare configured to determine an approximate number of persons bydetermining a number of areas in the images captured at step 800 thatare a different color than a preregistered color of the floor.Additionally, the server 250 may be programmed with image processingalgorithms that are configured to determine an approximate size of eachof the persons using a size of each of the areas in the images capturedat step 800 that are a different color than a preregistered color of thefloor. Alternatively, the system 200 may include a temperature sensorthat detects a radiation temperature of a person, and the detectedradiation temperature of the person may be used to determine theapproximate size of the person. According to an embodiment, indetermining the approximate number and sizes of persons, the system mayonly include persons who are in front of and/or facing an entrance tothe area.

At step 820, the system 200 determines a location and size of each freespace. In embodiments, the system 200 captures one or more images of thearea using the one or more cameras 210. For example, one or more cameras210 in the ceiling of an elevator car 310 illustrated in FIG. 3A mayobtain images of the elevator car 310 including any persons therein.These images may be transmitted from the one or more cameras 210 to theserver 250 via any type of wired or wireless connection, either directlyor via a network such as the Internet or a LAN. The system 200, usingthe server 250, analyzes these captured images to identify locations andsizes of areas in the images having the color of the floor, and deemsthese areas to be free spaces in the area. For example, the server 250may be programmed with image processing algorithms that are configuredto determine free spaces in the area as described above with respect toFIG. 6.

At step 830, the system 200 determines standing positions in the freespaces based on the determined sizes. In embodiments, the system 200,using the server 250, determines standing positions in the area that areavailable for the persons in the queuing area or other waiting area, asdetermined using the location and sizes of free spaces in the areadetermined at step 820 as well as the number and size of the persons inthe queuing area or other waiting area determined at step 810, asdescribed herein with respect to FIGS. 9A-12.

At step 840, the system 200 displays footprints at standing positions.In embodiments, the system 200, using the server 250, causes the displaydevice 230 to display footprints at the standing positions determined atstep 830. The system may wait until one or more persons have exited fromthe area and the amount of free space is no longer increasing beforedisplaying the footprints at the standing positions. According to anembodiment, the footprints may be displayed moving between the locationof each person in the queuing area or other waiting area and thestanding position for the person in the area. In this manner, a personin the waiting area may be directed to a free space in the area.

FIG. 9A shows a graphical depiction of an example of areas of anelevator car 900 occupied by three persons, P₁ 910, P₂ 920, and P₃ 930.The floor of the elevator car 900 is represented by the 8 by 8 grid ofFIG. 9A. For example, position (1,1) in the grid shown in FIG. 9A mayrepresent the front left corner of the floor of the elevator car 900,position (1,8) may represent the front right corner, position (8,1) mayrepresent the back left corner, and position (8,8) may represent theback right corner. Person P₁ 910 is centered at position (2,2) in thegrid. In other words, person P₁ 910 is standing on the floor of theelevator car 900 near the front left corner. Person P₂ 920 is centeredat position (2,7), and person P₃ 930 is centered at position (7,2). Theinner circle surrounding each of persons P₁ 910, P₂ 920, and P₃ 930depicts the person's minimum occupancy area (e.g., a minimum amount ofspace occupied by the person), and the outer circle depicts the person'smaximum occupancy area (e.g., a maximum amount of space available andallowed to be occupied by the person; this may include the person'sminimum occupancy area plus some amount of personal space surroundingthe person).

FIG. 9B depicts information about the persons in the example elevatorcar 900 of FIG. 9A that the system 200 may determine using a scanner 220in accordance with aspects of the invention. As illustrated in FIG. 9B,the scanner 220 may determine that P₁ 910 in the example elevator cardepicted in FIG. 9A has a minimum occupancy area of 0.20 m², P₂ 920 hasa minimum occupancy area of 0.44 m², and P₃ 930 has a minimum occupancyarea of 0.20 m².

FIG. 9C depicts information about the example elevator car 900 of FIG.9A that the system 200 may determine using one or more cameras 210 andthe scanner 220 in accordance with aspects of the invention. Inembodiments, using the images captured by the one or more cameras 210and/or image data received from the scanner 220, the system 200 maydetermine a minimum occupancy area and a maximum occupancy area for eachperson, as described with respect to FIG. 12. This information may beupdated each time a new image is received from the one or more cameras210 and/or new data is received from the scanner 220.

FIGS. 10A, 10B, 10C, 10D, and 10E illustrate an example of the system inoperation in accordance with aspects of the invention. For example, FIG.10A shows an elevator car that is crowded with persons 1000. Asdescribed above, using the one or more cameras 210 and the one or moresensors 220, the system 200, using the server 250, determines a numberof persons waiting to enter the elevator car as well as a minimumoccupancy area of each person 1040, 1050, 1060. The elevator car opensits door, and the system 200 waits for persons to finish exiting theelevator car. The system 200 then uses the server 250 to determine thedensity of the persons in the elevator car, and determines that thedensity is greater than or equal to a threshold value (i.e., theelevator car is crowded with persons 1000). The system 200 then uses theserver 250 to analyze images captured by the one or more cameras 210,determine a free space 1010 in the elevator car, and display footprints1020 and 1030 on or adjacent to the feet of persons in front of the freespace 1010, as illustrated in FIG. 10A. The system 200 then moves thefootprints 1020 and 1030 from the persons in front of the free space1010 to the free space 1010, so as to lead the persons in front of thefree space 1010 to move rearward to the free space 1010, as illustratedin FIG. 10B.

The system 200 once again uses the server 250 to analyze images capturedby the one or more cameras 210, determine a free space 1090 in theelevator car, and display footprints 1070 and 1080 on or adjacent to thefeet of persons in front of the free space 1090, as illustrated in FIG.10C. The system 200 then moves the footprints 1070 and 1080 from thepersons in front of the free space 1090 to the free space 1090, so as tolead persons in front of the free space 1090 to move rearward to thefree space 1090, as illustrated in FIG. 10D. The system 200 once againuses the server 250 to analyze images captured by the one or morecameras 210, determine a free space 1095 in the elevator car, anddisplay footprints 1096 and 1097 to indicate standing positions for twoof the three persons 1040, 1050, 1060 waiting to enter the elevator car,as illustrated in FIG. 10E.

FIG. 11 depicts an exemplary method that may facilitate the entry of oneor more additional persons into a crowded area, in accordance withaspects of the invention. The steps of the method may be performed inthe computer system of FIG. 1, the system of FIG. 2, and the environmentillustrated in FIGS. 3A and 3B and are described with reference to theelements and steps described with respect to FIGS. 1, 2, 3A, and 3B.

At step 1100, the system 200 uses the one or more exterior cameras 240and the server 250 to determine a number of persons and a minimumoccupancy area for each person waiting to enter an area such as anelevator car, train car, room, or other location, as described above. Atstep 1110, in response to an opening of a door to the area, once personsfinish exiting the area, the system 200, using the one or more cameras210, the one or more sensors 220, and the server 250, determines adensity of persons in the area. For example, the system 200 maydetermine a number of persons in the area. The system 200 may also usethe number of persons and minimum occupancy areas determined at step1100 in determining the density of persons in the area.

At step 1120, the system 200, using the server 250, determines whetherthe density of persons in the area determined at step 1110 is greaterthan or equal to a predetermined threshold value (e.g., a crowdingthreshold). For example, the system 200 may determine whether a numberof person in the area exceeds a predetermined number of persons. If thesystem 200 determines that the density is greater than or equal to thepredetermined threshold value, then flow proceeds to step 1130. On theother hand, if the system 200 determines that the density is not greaterthan or equal to the predetermined threshold value, flow proceeds tostep 1160, and the method for an uncrowded area is executed asillustrated in FIG. 12, starting at step 1220.

At step 1130, the system 200, using the server 250, analyzes images fromthe one or more cameras 210 to determine whether there is free space inthe area that is not near an entrance to the area, as described herein.If the system 200 determines that there is free space in the area thatis not near the entrance, then flow proceeds to step 1140. On the otherhand, if the system 200 determines that there is not any such freespace, then the system 200 proceeds to step 1150 and processing iscompleted. At step 1140, the system 200, using the server 250 and thedisplay device 230, displays footprints to lead persons in front of thefree space to move rearward, as described with respect to FIG. 6 andillustrated in FIGS. 10A, 10B, 10C, 10D, and 10E. The flow then returnsto step 1130. In this manner, free space may be created near theentrance to the area to facilitate the entry of one or more additionalpersons into the area.

FIG. 12 depicts an exemplary method that may increase the comfort of oneor more persons in an uncrowded area by increasing an amount of personalspace, in accordance with aspects of the invention. The steps of themethod may be performed in the computer system of FIG. 1, the system ofFIG. 2, and the environment illustrated in FIGS. 3A and 3B and aredescribed with reference to the elements and steps described withrespect to FIGS. 1, 2, 3A, and 3B.

At step 1200, the system 200 uses the one or more exterior cameras 240and the server 250 to determine a number of persons and a minimumoccupancy area for each person waiting to enter an area such as anelevator car, train car, room, or other location, as described above. Atstep 1205, in response to an opening of a door to the area, afterpersons finish exiting the area, the system 200, using the one or morecameras 210, the one or more sensors 220, and the server 250, determinesa density of persons in the area. For example, the system 200 maydetermine a number of persons in the area. The system 200 may also usethe number of persons and minimum occupancy areas determined at step1200 in determining the density of persons in the area.

At step 1210, the system 200, using the server 250, determines whetherthe density of persons in the area determined at step 1205 is greaterthan or equal to a predetermined threshold value (e.g., a crowdingthreshold). For example, the system 200 may determine whether a numberof person in the area exceeds a predetermined number of persons. If thesystem 200 determines that the density is greater than or equal to thepredetermined threshold value, then flow proceeds to step 1215, and themethod for a crowded area is executed as illustrated in FIG. 11,starting at step 1130. On the other hand, if the system 200 determinesthat the density is not greater than or equal to the predeterminedthreshold value, then flow proceeds to step 1220.

At step 1220, persons enter the area. At step 1225, the system 200,using the one or more cameras 210, the one or more sensors 220, and theserver 250, determines whether additional persons are entering the area.If the system 200 determines that additional persons are entering, thenflow returns to step 1220. On the other hand, if the system 200determines that no additional persons are entering, then flow proceedsto step 1230.

At step 1230, the system 200, using the one or more cameras 210 and theserver 250, determines a number of persons in the area. The system 200,using the server 250, also determines a maximum occupancy area and amaximum occupancy region for each person based on the number and sizesof the persons in the area. A person near a wall may have a smallermaximum occupancy region, which may be acceptable since a region nearthe wall side may not be possible to occupy.

According to an embodiment, the maximum occupancy area for person may bedetermined by the system 200, using the server 250, as follows, where Fis the floor area of the area such as the elevator car, the train car,the room, or the other location and P is the minimum occupancy area ofthe person:

${{1.\mspace{14mu} P_{1}} + \ldots + P_{n}} = {\sum\limits_{k = 1}^{n}P_{k}}$

$\sum\limits_{k = 1}^{n}{P_{k}\text{:}}$

Sum of minimum occupancy areas of the persons

${{2.\mspace{14mu} F} - {\sum\limits_{k = 1}^{n}P_{k}}} = {{Remainder}\mspace{14mu} {of}\mspace{14mu} F}$

-   -   3. Remainder of F/number of the persons=f        -   f: Relocatable floor area per person    -   4. P_(k)+f=P_(k)f        -   P_(k)f: Maximum area allowed to be occupied by a person

At step 1235, for each pair of persons having overlapping maximumoccupancy regions, the system 200, using the server 250, determineswhether the overlapping region is greater than or equal to a thresholdvalue, as described below with respect to FIG. 13B. If the system 200determines that no pair of persons has an overlapping region that isgreater than or equal to the threshold value, then flow proceeds to step1240 and processing ends. On the other hand, if the system 200determines that one or more pairs of persons have an overlapping regionthat is greater than or equal to the threshold value, then flow proceedsto step 1245.

At step 1245, the system 200, using the server 250, identifies the pairof persons having the largest overlapping region and determines, usingthe one or more cameras 210, the location of free space near the pair ofpersons, as described herein. At step 1250, the system 200, using theserver 250, determines a new standing position in the free space for theperson from the pair of persons who is closest to the free spacedetermined at step 1245. The new standing position is determined suchthat an overlapping area of the person with other persons is smallest.The system 200, using the server 250, may then cause the display device230 to display footprints at a location of the person from the pair ofpersons who is closest to the free space determined at step 1245. Thesystem 200, using the server 250, may then cause the display device 230to display footprints at the new standing position in the free space forthe person closest to the free space from the pair of persons determinedat step 1245. The footprints may be displayed moving between thelocation of the determined person adjacent to the free space and the newstanding position for the determined person. Flow then returns to step1235.

According to an alternative embodiment, prior to persons entering thearea in step 1220, the system 200, using the server 250, may determinethe maximum occupancy area for each person, including the persons aboutto enter, and determine a maximum occupancy region for each personcorresponding to the maximum occupancy area. The system 200, using theserver 250, may then cause the display device 230 to display footprintsto lead one or more persons already in the area to new standingpositions. The system 200, using the server 250, may then cause thedisplay device 230 to display footprints to lead one or more waitingpersons to standing positions in the area.

According to another embodiment, when a door of an area such as anelevator car, train car, room, or other location is opened, the system200, using the server 250, may cause the display device 230 to presentfootprints to a person near the door to lead that person to a newstanding position that does not obstruct another person who is exitingthe area. According to yet another embodiment, when the floor of an areasuch as an elevator car, train car, room, or other location isobstructed or otherwise not visible due to, for example, crowds orbaggage, the system 200, using the server 250, may cause the displaydevice 230 to present footprints on a display on the ceiling or a wallof the area.

EXAMPLE 1

According to Example 1, at step 1230 as described above, for each personin an elevator car, the system 200 determines a maximum area allowed tobe occupied by each person based on a number of persons in the elevatorcar as well as the size of each person in the elevator car and thendetermines a maximum occupancy region for each person corresponding tothe maximum area. In this example, the maximum occupancy region isdetermined to have a circular shape and the same area for every person.The maximum occupancy area may be determined as follows.

-   -   F: floor area=4 m²    -   P: Minimum occupancy area of a person=0.2 m²    -   Radius r_(p)=0.25 m; P=πr²=3.14×(0.25)²=0.196=0.2 m²

${{1.\mspace{14mu} P_{1}} + \ldots + P_{5}} = {{\sum\limits_{k = 1}^{5}P_{k}} = {1.0\mspace{14mu} m^{2}}}$

-   -   2. 4.0 m²−1.0 m²=3.0 m²    -   3. 3.0 m²/5=0.6 m²: Relocatable floor area per person    -   4. 0.2 m²+0.6 m²=0.8 m²=Pf:        -   Pf: The maximum area allowed to be occupied by a person    -   0.8 m²=πr_(pf) ²    -   r_(pf) ²=0.8/3.14=0.254=(√{square root over (0.254)})²    -   r_(pf)=√{square root over (0.254)}=0.504=0.5    -   Pf=a circle with a radius of about 0.5 m

EXAMPLE 2

FIGS. 13A, 13B, 13C, and 13D illustrate an example of the system 200 inoperation in accordance with aspects of the invention. According toExample 2, in steps 1235, 1245, and 1250 as described above, thefollowing processing may be performed by the system 200. For each of thepersons 1300, 1320, 1340, 1360, and 1380, the system 200, using theserver 250, determines the maximum occupancy regions 1310, 1330, 1350,1370, and 1390, assuming the position of each person to be the center ofeach maximum occupancy region.

The system 200, using the server 250, identifies a pair of persons 1320and 1380 having maximum occupancy regions 1330 and 1390 with anoverlapping region 1395 (illustrated in FIG. 13B) having an area greaterthan a threshold value and also having the greatest overlapping regionamong all of the pairs of persons. The threshold value may varydepending on the number of the persons in the elevator car. When pairshaving an equal overlapping area are present, any of the pairs may beselected.

The system 200, using the server 250, then determines a free space usingthe one or more cameras 210 and causes the display device 230 to presentfootprints 1396 (illustrated in FIG. 13C) so as to lead the person 1380of the pair who is closest to the free space to move to the free space.

The system 200 may repeat the above steps and, using the server 250,determine a pair of persons 1340 and 1360 having maximum occupancyregions 1350 and 1370 with an overlapping region 1397, determine a freespace, and cause the display device 230 to present footprints 1397(illustrated in FIG. 13D) so as to lead the person 1360 of the pair whois closest to the free space to move to the free space.

In embodiments, a service provider could offer to perform the processesdescribed herein. In this case, the service provider can create,maintain, deploy, support, etc., the computer infrastructure thatperforms the process steps of the invention for one or more customers.These customers may be, for example, any business that uses cloudcomputing technology. In return, the service provider can receivepayment from the customer(s) under a subscription and/or fee agreementand/or the service provider can receive payment from the sale ofadvertising content to one or more third parties.

In still additional embodiments, the invention provides acomputer-implemented method, via a network. In this case, a computerinfrastructure, such as computer system/server 12 (FIG. 1), can beprovided and one or more systems for performing the processes of theinvention can be obtained (e.g., created, purchased, used, modified,etc.) and deployed to the computer infrastructure. To this extent, thedeployment of a system can comprise one or more of: (1) installingprogram code on a computing device, such as computer system/server 12(as shown in FIG. 1), from a computer-readable medium; (2) adding one ormore computing devices to the computer infrastructure; and (3)incorporating and/or modifying one or more existing systems of thecomputer infrastructure to enable the computer infrastructure to performthe processes of the invention.

The descriptions of the various embodiments of the present inventionhave been presented for purposes of illustration, but are not intendedto be exhaustive or limited to the embodiments disclosed. Manymodifications and variations will be apparent to those of ordinary skillin the art without departing from the scope and spirit of the describedembodiments. The terminology used herein was chosen to best explain theprinciples of the embodiments, the practical application or technicalimprovement over technologies found in the marketplace, or to enableothers of ordinary skill in the art to understand the embodimentsdisclosed herein.

What is claimed is:
 1. A computer implemented method, comprising:determining, by a computing device, at least one free space in alocation using at least one camera; determining, using the computingdevice, a new position for a first person in the location based upon thedetermined at least one free space in the location; and presenting animage to indicate the determined new position for the first person inthe location.
 2. The method according to claim 1, further comprisingdetermining, by the computing device, a density of persons in thelocation using the at least one camera.
 3. The method according to claim2, wherein in response to the determined density being less than apredetermined threshold value, the determining the new positioncomprises determining, as the new position, a position that is fartherfrom a second person in the location than a current position of thefirst person.
 4. The method according to claim 2, wherein in response tothe determined density being greater than or equal to a predeterminedthreshold value, the determining the new position comprises determining,as the new position, a position that is farther from an entrance to thelocation than a current position of the first person.
 5. The methodaccording to claim 2, wherein the determining the density of persons inthe location is automatically performed in response to an opening of adoor to the location.
 6. The method according to claim 2, wherein thedetermining the density of persons in the location is automaticallyperformed in response to determining that persons have finished exitingthe location.
 7. The method according to claim 1, wherein the image is afootprint that is presented near the first person.
 8. The methodaccording to claim 7, wherein the footprint is displayed moving betweenthe first person and the new position.